Seiko Cal. 7131 - 256

The Seiko 7131-256 represents an important milestone in Seiko's 1971 lineup. Powered by the 7131 caliber with 20j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-1e2e08836488]

Also known as: Goldfeather, Navigator

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

42mm

Case Thickness

10.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Black

Jewels

20j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1971

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